C++ 中的 Windows VSS（卷影复制）

发布于 2024-11-01 14:54:18 字数 1081 浏览 5 评论 0原文

我需要一些帮助来让 VSS 在 C++ 中工作。我的基本目标是扫描文件夹中是否有更改的文件（按修改日期），然后使用 VSS 将它们备份到另一台设备。该文档不清楚（至少对我来说）如何做到这一点，而且我找不到任何合适的示例来说明如何做到这一点。

我的流程应该是这样的：

扫描文件夹并创建修改文件的列表。 VSS 快照已创建并复制文件。 VSS 快照被丢弃或释放（或其他方式）。

这是我到目前为止所拥有的（为简洁起见，删除了错误处理）：

VSS_SNAPSHOT_PROP snapshotProperties;
::CoInitialize(NULL);
::CreateVssBackupComponents(&m_pBackupComponents);
m_pBackupComponents->InitializeForBackup();
m_pBackupComponents->StartSnapshotSet(&m_SnapshotSetId);
m_pBackupComponents->AddToSnapshotSet(wszVolumePathName, GUID_NULL, &snapshotId);
m_pBackupComponents->SetBackupState(TRUE, FALSE, VSS_BT_FULL, FALSE);
m_pBackupComponents->PrepareForBackup(&pPrepareForBackupResults);
pPrepareForBackupResults->Wait();
m_pBackupComponents->DoSnapshotSet(&pDoSnapshotSetResults);
m_pBackupComponents->GetSnapshotProperties(snapshotId, &snapshotProperties); <-- Never gets beyond here

好的，这似乎是正确的方法，但是，复制线程冻结在代码的最后一行，并且永远不会再进一步。

谢谢， J

编辑：更新以显示在 GetSnapshotProperties() 处停止的新方法

原文

I need some help with getting VSS to work in C++. My basic aim is to scan a folder for changed files (by modified date) and then back them up to another device using VSS. The documentation is unclear (to me at least) on how I can do this and I cannot find any decent examples of how to do it.

My process should work like this:

Folder is scanned and a list of modified files is created.
VSS snapshot is created and the files are copied.
VSS snapshot is discarded or released (or whatever).

Here's what I have so far (error handling removed for brevity):

VSS_SNAPSHOT_PROP snapshotProperties;
::CoInitialize(NULL);
::CreateVssBackupComponents(&m_pBackupComponents);
m_pBackupComponents->InitializeForBackup();
m_pBackupComponents->StartSnapshotSet(&m_SnapshotSetId);
m_pBackupComponents->AddToSnapshotSet(wszVolumePathName, GUID_NULL, &snapshotId);
m_pBackupComponents->SetBackupState(TRUE, FALSE, VSS_BT_FULL, FALSE);
m_pBackupComponents->PrepareForBackup(&pPrepareForBackupResults);
pPrepareForBackupResults->Wait();
m_pBackupComponents->DoSnapshotSet(&pDoSnapshotSetResults);
m_pBackupComponents->GetSnapshotProperties(snapshotId, &snapshotProperties); <-- Never gets beyond here

Ok, that seems to be the correct method however, the copy thread freezes at the last line of code and never gets any further.

Thanks,
J

EDIT: Updated to show new method which stops at GetSnapshotProperties()

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夜光 2024-11-08 14:54:18

在 DoSnapshotset 之后，您必须调用以下函数

hr = pDoSnapshotSetResults->Wait();
if (!SUCCEEDED(hr)){ unLoadLibrary();返回1；一旦

    HRESULT hrDoSnapshotSetResults;

    hr = pDoSnapshotSetResults->QueryStatus(&hrDoSnapshotSetResults, NULL);
    if (!SUCCEEDED(hr)){    unLoadLibrary(); return 1;  }

此功能成功，您就可以获得快照属性。

After DoSnapshotset yu have to call the following function

hr = pDoSnapshotSetResults->Wait();
if (!SUCCEEDED(hr)){ unLoadLibrary(); return 1; }

    HRESULT hrDoSnapshotSetResults;

    hr = pDoSnapshotSetResults->QueryStatus(&hrDoSnapshotSetResults, NULL);
    if (!SUCCEEDED(hr)){    unLoadLibrary(); return 1;  }

once this function are sucessfull then you can get the snapshotproperties.

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